/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.lealone.cluster.streaming.management;

import java.util.HashMap;
import java.util.Map;

import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;

import org.lealone.cluster.streaming.StreamSummary;

import com.google.common.base.Throwables;

public class StreamSummaryCompositeData {
    private static final String[] ITEM_NAMES = new String[] { "mapName", "files", "totalSize" };
    private static final String[] ITEM_DESCS = new String[] { "Map Name", "Number of files", "Total bytes of the files" };
    private static final OpenType<?>[] ITEM_TYPES = new OpenType[] { SimpleType.STRING, SimpleType.INTEGER,
            SimpleType.LONG };

    public static final CompositeType COMPOSITE_TYPE;
    static {
        try {
            COMPOSITE_TYPE = new CompositeType(StreamSummary.class.getName(), "StreamSummary", ITEM_NAMES, ITEM_DESCS,
                    ITEM_TYPES);
        } catch (OpenDataException e) {
            throw Throwables.propagate(e);
        }
    }

    public static CompositeData toCompositeData(StreamSummary streamSummary) {
        Map<String, Object> valueMap = new HashMap<>();
        valueMap.put(ITEM_NAMES[0], streamSummary.mapName.toString());
        valueMap.put(ITEM_NAMES[1], streamSummary.files);
        valueMap.put(ITEM_NAMES[2], streamSummary.totalSize);
        try {
            return new CompositeDataSupport(COMPOSITE_TYPE, valueMap);
        } catch (OpenDataException e) {
            throw Throwables.propagate(e);
        }
    }

    public static StreamSummary fromCompositeData(CompositeData cd) {
        Object[] values = cd.getAll(ITEM_NAMES);
        return new StreamSummary((String) values[0], (int) values[1], (long) values[2]);
    }
}
